Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:38:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graf[element].size(); i++) ^ user.cpp:24:16: warning: unused variable ‘c’ [-Wunused-variable] static int c=0; ^ user.cpp:27:19: warning: unused variable ‘z’ [-Wunused-variable] int i,element,z,y=0; ^ user.cpp:27:21: warning: unused variable ‘y’ [-Wunused-variable] int i,element,z,y=0; ^